Top 3 ways to improve peristalsis, and reduce Symptoms of burping, bloating, nausea belching, and vomiting sensation. What is peristalsis ? Peristalsis is a series of wave-like muscle contractions that move food through the digestive tract. It starts in the esophagus where strong wave-like motions of the smooth muscle move balls of swallowed food to the stomach. There, the food is churned into a liquid mixture called chyme that moves into the small intestine where peristalsis continues. The moti